<p dir="ltr">Hi,</p>
<p dir="ltr">Some GDAL raster processing modules use multiprocessing. If you click on the help button in the GDAL Windows (that opens when you click on a GDAL function), you will see more info on the application. Some like gdal_grid have a switch like -all_CPU (or something like that). If you add that to the script (yellow pencil) that will activate the function.</p>
<p dir="ltr">Nicolas</p>
<div class="gmail_quote">On May 16, 2016 6:18 AM, "ginetto [via OSGeo.org]" <<a href="/user/SendEmail.jtp?type=node&node=5266644&i=0" target="_top" rel="nofollow" link="external">[hidden email]</a>> wrote:<br type='attribution'><blockquote style='border-left:2px solid #CCCCCC;padding:0 1em' class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
I should rectify... in this moment processing MT support is
<br />experimental and available only in the branch of the GSOC project.
<br /><br />regards
<br />Luigi Pirelli
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<br /><br /><br />On 16 May 2016 at 11:58, Luigi Pirelli <<a href="/user/SendEmail.jtp?type=node&node=5266615&i=0">[hidden email]</a>> wrote:
<div><div class='shrinkable-quote'><br />> MultiThreading was introduced for rendering of different layer... in
<br />> layer rendering is on single core.
<br />> A GSOC project (<a href="https://qgisgsoc2015.wordpress.com/" target="_top" rel="nofollow" link="external">https://qgisgsoc2015.wordpress.com/</a>) introduced MT in
<br />> Processing and was completed by Alexandre Bruy (if I well remember it
<br />> would be available at least in processing master)
<br />> Nyall Dowson is working in a QgsTaskManager and relative QgsTask class
<br />> (<a href="https://www.youtube.com/watch?v=7pXBZtWYFJc" target="_top" rel="nofollow" link="external">https://www.youtube.com/watch?v=7pXBZtWYFJc</a>) and probably Processing
<br />> and Task Manager will converge in a while.
<br />>
<br />> other than this you always create a plugin that run it's python
<br />> process using all cores you want as stated by Nicolas Cadieaux... you
<br />> should only have a lot of care using qgis classes, most of them are
<br />> not thread safe in this moment.
<br />>
<br />> regards
<br />> Luigi Pirelli
<br />>
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<br />>
<br />> On 13 May 2016 at 21:29, Elstermann, Mike <<a href="/user/SendEmail.jtp?type=node&node=5266615&i=1">[hidden email]</a>> wrote:
<br />>> I have found the click for use more processor cores for rendering,
<br />>> but how can QGIS use more processor cores for geoprocessing? My Mac use only
<br />>> one of four cores :-(
<br />>>
<br />>> Best regards
<br />>> mikeE., The geoObserver.
<br />>>
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